Railway signaling.



W. W. TALBERT.

RAILWAY SIGNALING. APPLICATlQN FILED JUNE 2. 1913.

Patented Apr. 23, 1918.

' Theaccompanying.drawingis adiagram-L matic viewcshowingi one form ofrailway.

signalingfernbodying.myinventionb estates: a o.

1 1 t ,u Applicationfilefi lune211913;;SeriaLNoMWLIQQ. H

1 Toalltolwflr'it mag concern:

l aBeit known that'L WILLIAM ma citizen "ofthe United States, residingat .Ch'icago, in thegountyof Cook and State of. Illinois, havejinventedcertain new and. u er. f fulllmprovements inlRailway Signaling, of

WILLIAM w; rarnnnrjo'r omaso, init ators, gi-ssrsiron Terrain narrowswirorrcz sIeNAL' clorrrnnr, or, swissv nnn, rnnrrsrrvan n, aoonroiarrrrorr' or rnivir- :EYPVANIA whichthe ifoll'owinglis aspecification.

. ,Myinvention relates :to railwaysignaling H and .lparticularly to.signaling for; stretches of single track over. which; trafiie :moves inbothg'directions.

I: will cles'crlbe one naling embodying my invention and will Miditrack:isxdivided into successive sections of which three 'SQCtIOIIS andC are; shown. A As ihere. shown, f'tlleilllnlts of-these 1 sections thenpoint out theanovelLifeatures]. thereof in claims; A

TAL E T,

' RA W sie iem Ts' je ifi afi f te te l 'e y l Patented Apr; as, ars.

is moving jbetween the horizontal and. in.

clined positions anjdvice yersa andathircl CllCLIllJ\COIllZlOllGI" 11which is closed only f when thexsignal is in the stopflposition;

Signal'S operate-s a pole changer 13. -LYSignalS is controlled byjapolarized. line, relay :5, and .signalfi is controlled by a polarizedlinerelay .6, ,Signals S and S are controlledrespectively by line relays7 and r 8 which, however, as, hereqshown are ,The ircuit for theinclined or, proceed yWitlL caution. position of signalslis fromnate'the track rails of alirailway' track,*-which:

are determined by insulated 'jointsfil in both .ofithe linesof trackrails jbut it is 1111-. "derstood that' the limits of thersections. may"be d e'fined in other ways Eachiof these-. track: sections is providedwith a* track Oil: cuit comprising; as usuah a batt ry. th trackrai'lsofthe section, and attack relay.

2 4 l although have hereilr shown only one track circuit foreach'sectionA; B,iand C,

it is uiiderstood that any orfall of these sec- 'tions mayg'i'fclesired,be provided with two or nore track'circuits. l a

Trafiic through they stretch in the direct tionl indicated by thearrowis governed by signals. S, S l and St located respectively at theentrance encls' of sections rh B and Gr traflicfin the oppositeCl1I'QCtIO11 through sections Band A is governed by a signal S AShereshojwn, signals S? and "S are.

each adapted to assume twopOsitions,;hori-L zontal and vertical.ihchcatlng respectively a :7 "ca g n, 1 1 1S, s op and procee anc Shanaanc are each adapted to assume threepositions,

horizontal, i di edmnd. vertical, indicating respectively stop, .proceedwith caution,?

and;proceecl. I It is!understoodthat these two latter indications areboth proceed inclicationsy-the former of the. two 'rneaning that.jtllQ'IlBXt signalor some'other s gnal 111 .advanee lndicates tstop.

controlof signal S are similartojthose just cuitkfor the vertical orproceed? position of this signal is from battery 22 through wire 23,icontact 24 Contact. 52, wire 26,-signal S, WlreEZ-to battery 22. Thecircuit'sfor the traced for signal-S. The circuit for theficon .trolofsignal; S is from, battery 68 through ,;.Wire 69-, gcontactl70, wire 71,signal'fiiwire 1 72. .to battery 68. (The circuitfor the control :Ofsignal S is s'iinilanto that just tracedfor usi'gnal S 1 The circuitforline relay 5. of signal S is from battery 12 through pole-changer 135$.w1re 14;,icontact 1'5, w1re 16,..c1rcuit conr troller 9,"wire 17,contact 18', wire 19; re-lay ;5, .wire 203; common wire 50, wire.5'1,Tpolechanger 13 to battery. 12.. VVhenlrpolechangerl 1S in theposition in which "itis .shown in the clrawing,' the positive side ofbattery 12 isconnected withwires l4 and 17, ianolthe polarity of thecurrent through relay 5 is then such that the polarized arniature 52 ofthisrelay is closed sothat signal S. is "in the vertical positionindicatiiivgflpmeeed. a Thec-ircuit forlinerelay 6 of signal S. is

from 1 battery 12 through pole-changer 13,

wire 14:, contact 15,. wires 16 and4t9. relay 6, wire 50, common wire'0, wire 51, pole changer 13 to battery 12. .With thepoler changer13 inthe' position shown in the .drawing, the polarlty of the current throughrelay 6 is such that its polarized armature contact is closeclwso thatsig'nalS is ilrthe verticaldposition indicating fproceedi? The circuitfor line relay 8 of signal S is from battery 29,". through wire 30,contact I, 31, wire 32 bach contact point 33ofrelay X,

wire 34, contact 35, wire 36,relay18, wire 37,.corninon wire. 0tobattery 29.

is anauxiliaryrelay for the control of signal-S in a manner hereinafterexplained.

3 This relay x is pr ovided'with a pick-up it 1 circuit and afholding""circuit.' The pick-up circuit is from1battery 28,throughwires38 and 39, back contact point of track relay wigrgized nd tr k layt oi-"section A is -i'or {section A, lwire '41, contact 4230f v 'reny 6,wire 43, relay X, w1res'44 and to battery'28. It will be seen thatthislpickup: circuit is closed only when relay 6 1s ene deenergized. Theholding circuit for relay of cameras of relay 6, wire 43, relay X,Wi'res'i44 and 45: to battery 28,-"It'w1ll be seen fthatthisholding-circuit is closed only after relay X"h% s beenipic d upand onlyvvhile1relay 6is deenergized.

The operation of the system is as" follows:

[Assuming firstthat acar or train'passes V I soon, however, as relay 6has closed, and

"along the track in the direction'indicated by I the arrow; as such caror, train enters track section A it' opens track relay 4 itor'this section, thereby opening the circuit of line I frelay' 8 so that signaljSchanges tolf-stop" indication and 5 also 1 op'enin line relay 5 so thatsignal S 'changes to stop indication. Theopening of track re I layj4also closes the pick-up circuit of aux} J iliary relay X so that thisrelay then becomes genergiz'ed. As such car-or trainenterstraeksectionBfitopeiis track relay 4 of this sec- I tion, therebyopening at -th is point the eircuit of line relay 8-so that signal S,con-' ftinues to indicate-stop as longasthe car or train-i occupiestrack section B. The opening oftrack relay 4 oflsection. B also opensthe circuit of line; relay 6 so that signal Sjithen' changes tostop"indieation. This change of signal S" changes circuit controllers:9'and 10 to the position indicated in '1 dashlines andclosescircuit'controller ll.

Theopening of line relay 6-closes the holding circuit for auxiliaryrelay 'X' so that even afterthe entire car or train has passed Q'llt ofthe trackasection A this auxiliary re- 1 lay X remains'energizedr Theclosing of cuit'forline relay 5': from negative side of lci'rcuiteontroller ll and the reversal of circuit controller'lO closes thefollowin'gcirbattery'28, through"wire 45, circuit "c011 troller'll, wire53, contact 54 of relay X,

;wi re s"-and17, contact 18,'wire l9, relay 5, "wire-20, common wire 0,wires 50' and 56,

1 circuitcontroller 10, wire 57, to positiveside of battery 28Thenegative'side of battery Y 28 isnow connected with wire 17 so thatthe r V j f polarity of the current in relay 5' is such that i I e v"The-ineutral'conta'ct 24of'th1s relay 13, however,- closed, so-thatsignal S then moves to" the polarized contact 52 of this'relay-is open.

With-caution. j i 1 i H i the caror tr'ain enters track section C,

or the circuit of indicating proceed.

K Assumlng now that a carer train passes along the track in thedirection opposite to it opens track relay 4 for that section, therebydeenergizing line relay 7 so that signal S moves to stopposition.

VVhen' the'entire car or train'leaves section B, the closing of trackrelay 4 of that section closes the, circuit of line relay 6; sincehowever signal S is then in the Vstop position, pole-changer 13 has beenreversed so that the negative side of battery is then connected withwire 16, and the polarity of the current in relay 6 is then such thatthe :olarized armature of this relay is open; the

contact 42 of this relay opens i the holding circuit of auxiliary relayX so that the latter relay opens, and thereby opens at contact 54 thecircuit last traced for line. relay 5. As

before circuit controller 9 has been reversed,

-a temporary shunt is closed for the circuit of relay 5 as follows: Fromnegative side of battery- QSthrough wire 45, contact 58 of relay 6, wire59, circuit controller 9 to wire 17; this shunt keeps relay 5 energizedbe- "tween thetime thatrel'ay X opens and the time that circuitcontroller 9 is-reversed. As soon as circuit controller 9 reverses, linerelay 5 is disconnected from battery 28 and and'the'consequent openingof auxiliary relay X closes the circuit of line relay 8 so that si nal Sthen moves to roceed osition.

Since the. circuit of line relay 8-t'or signal S" is controlled by aback contact point of relay X, it will be seen that if this'flrelay X isat any time energized by accident, signal S will be caused to indicatestop.

After the entire car or train has passed outof section G, track relay 4of this section closes, thereby causing line relay 7 to close,

which in turn causes signal S to chalwe to proceed? position. Thismovement ot sign'al S reverses-pole-changer 13 to the position 111 which1t is shown in the drawing so that line relays 6 and 5 are thenenergized by current of such polarities that their polarized contactsare closed so that signals S and S then change to the'vertical positionthat indicated by the arrow. When such car or train enters track sectionC, it opens track relay 4, thereby causing signal S to change to tstopfindication; This movement-of signal S reverses pole-changer 13,

therebycausing signals S ands to change toithe inclinedpositionfforreasonshereinbefore explained. As the car orqtrain enters track-sectionBait openstrack relay f4: of: this section, thereby openingthecircuitfor line relay- 8 so that signal S then changes to stop'indication. trackrelayl also openshthe circuit: of line indication. Theopening of thistrack relay open neitherthe auxiliary nor the temporarycircuit for linerelay is'closed, hence signal S changes to Fstop"indication.

When the entire car or train leaves sectionv C, track relay A of thatsection closes'so-that signals changesto iproceed indication,

thereby again reversing; pole-changer 13. Y

As the car or train enterssection A, the opening of track relay 4 ofthis section holds open at this point the circuits for line relays 5 and8 so that signals S and S continue to indicate stop. 1 y i 1 Y When theentire car or'train has passed out of section B, the closing of trackrelayA of that section closes the circuit of line relay 6 the polarityof the currentin Whichisthen such that signal S changes to proceedindication. 'Line relay 6" now being closed, 1 and track relay 4- ofsection A being open,

the pick-up circuit for auxiliary relay X is closed, but the closing ofthis relay obviously has no effect on signal S becausethe circuit forline relay 5 is held open at track relay 4.

After the entire car or train has left track section A, the closingoftrack relay 4' for.

this section closes the circuits for line relays 5 and 8 so that signalsS and S then change to proceed indication and the parts of the apparatusagain assume the positions in which they are shown in the drawing.

It will be seen from the foregoing that'as a caror train proceeds alongthe track in the direction indicated by the arrow, auxiliary relay X isclosed while such car or train occupies track section A and remainsclosed 'as'long as the car or'train occupies track section. B; but whilea car or train proceeds along the track in the oppositedirection, theauxiliary-relay X is not closed while such car or train occupiestracksection B; hencep it Wlll be seen that during the movement in thedirection indicated by the arrow signal S indicates stop only while thecar or train occupies track section A, but that during movement in theopposite direction signal S indicates stop while the car or train occu--pies either track sections B or A.

Although I have herein shown and described only one formof railwaysignaling embodying my invention, it is understood that various, changesand modifications may incense The openingfiof. this bemadefthereinwithinthe scope of z-theap- I pended claims withoutdeparting fromathe spirit; and scope of my-invention. i

Havingthus described my invention, what Iclaimis: p I

1 In combination, va stretch of railway track, two, track sections,trackrelays and sources of current connctedwith the rails of thetrackwsectionsg a slgnal for. governing trafiic in one direction throughsaid: sections and adapted to indicate" stopan'd proceed, a circuit forsaid signal which circuit is controlled by "the: traclcrrelaysxforbothss0- track relay ofthe second section in advance of thesignal,meanscomprising an auxiliary relay for closing said branch, meanscon- 'tions; fa branchfor said circuit for removing the control of saidsignal circuit from'the trolled :bythe track relays when operated in a ione sequence by the passage of a car or train through the stretch in thedirection in which said signal governs traffic for energizing saidauxiliary relay and rendering the remainder of the last mentioned meansoperative Whereby said signal changes'to proceed when such car or trainleaves the first section in advance of thesignal, said means beinginoperativei to energizethe auxiliary relay when w the track relays areoperated in another sequence by the passage of a car or train throughthe stretch in the other direction whereby saidsignal is caused toindicate stop while such last-mentioned car or train i occupies eithersection, a second-signal for governing traflic in the opposite directionthrough the second section in advance ofthe firstsignal, andacontrolling circuit for 7 saidsecond signal which circuit is controlledby a back contact of said auxiliary relay and by atrack relay for saidsecond section in advance of said first signal.

2-. In combination, a stretch of railway track, two track sections,track relays, and ,l

sources of current connected with'the rails of the sections, anauxiliary "relay, means controlled by said track relays when operated inone sequence by the passage of a car or train through the stretchin onedirection; for energizing said auxiliary relay while the a car or trainoccupies the first of said sections and forholding it energized Whilethe car or train occupies the second sectlon, sald'means beingineffective to energize the auxiliary relay when the track vrelays areoperated in another sequence by the passage of a car or train in theother direction until the car or train has passed out of thesaid secondsection, and-a circuit for controlling said signal which circuitiscontrolled by a back con: tact of said auxiliary relay. 7

3. In combination, a stretch of railway track, two signals located atdiflerent points Ction andinto the said firstsection, a signal governingtraflic through the said second g section in the said second-mentioneddirec 01" igbvming *traflic in the isarne T direction throughsaidg'stretdnfl signal relayfor each 7 signal, a signal relay "circuitextending V threughuthe stretch and-including said relaysin multiple,Saidcircllit also including Whichftfaffic in the saididirectionleavesthe stretch-,itmgrk circuits-for the-stretch includjing' ti'n'ck relaysfor controlling said signal iqelay-eircuitgan auxiliaiiy source ofcurrent 'fiim'ein so'urceef current adj scent the end at 7 means foropening the signal-relay circuit adjacent the forward signal andconnecting the said 'auxiliarysource of current With theportion of thecircuit extending to the 15 fear from said point;

-eopie nffithisipatelit maiy -be.' obtained for five. cents each; byaddressing the fiommissioner of Patents i 3 washi wmn-e. Y

